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2 years ago

Can someone please help me solve this? I will give brainist for the person who does it correctly.

Mathematics

1 answer:

Rufina [12.5K]2 years ago

5 0

Answer:

Yes the car was speeding

Step-by-step explanation:

s = √(30fd) where

s is the speed of the car in mph
f is the coefficient of friction for the road
d is the length in feet of the skid marks

Substitute d = 41.5 and f = 0.8 into the equation:

s = √(30 x 0.8 x 41.5)

⇒ s = √(996)

⇒ s = 31.55946768...

Therefore, for these data, the speed of the car was 31.56 mph (to the nearest hundredth)

The speed limit was 30 mph, therefore the car was speeding as 31.56 > 30

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Answer:

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Step-by-step explanation:

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3 years ago

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3 years ago

Tom bought a PS4 on Black Friday for 25% off. If the system sells for $399, what is the sales price of the PS4?

Delicious77 [7]

Answer:

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Step-by-step explanation:

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7 0

3 years ago

Solve 4(4f-9)=-(2-f)

Whitepunk [10]

Answer:

f = $\frac{7}{15}$

Step-by-step explanation:

1. 4(4f - 9) = -(2-f) distribute the negative

2. 4(4f - 9) = -2 + f Distribute the 4

3. 16f - 9 = -2 + f Subtract f on both sides

4. 15f - 9 = -2 Add 9 on both sides

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3 years ago

Which pair of ratios makes a proportion?

Nana76 [90]

Answer:

D. 1/4 and 9/36

Step-by-step explanation:

If two ratios make a proportion then it can be shown as:

a/b = c/d ⇒ ad = bc

Let's verify the answer choices with this method

A. 1/4 and 5/25

1*25 = 4*5
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D. 1/4 and 9/36

1*36 = 4*9
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6 0

2 years ago